title: The prevalence of moderate mitral regurgitation in patients undergoing CABG.
abstract: OBJECTIVE
  The aim of this study was to determine the prevalence of moderate ischemic mitral regurgitation (IMR) in the contemporary CABG population. We also aimed to correlate the effective regurgitant orifice area (ERO) of any regurgitant mitral valve in patients with coronary artery disease with the semiquantitative integrated scale of IMR.
  
  
  METHODS
  From March 15 through June 15, 2006, 510 consecutive CABG patients in three tertiary centres were included in the study. All patients showing any sign of mitral regurgitation (MR) at the referring hospital underwent a preoperative transthoracic echocardiographic estimation of the degree of MR using the integrated scale (1-4) and ERO.
  
  
  RESULTS
  IMR was found in 141 patients (28%). The prevalence of moderate 2+ or worse IMR was 4% (95% CI; 2.5-6.1%) and the ERO corresponding to 2+ IMR or more ranged from 5 to 30 mm(2). Fourteen patients had an ERO between 15-30 mm(2).
  
  
  CONCLUSIONS
  According to our study, patients with moderate IMR, defined as an ERO between 15-30 mm(2), account for only 2.7% (95% CI; 1.5-4.7%) of a non-emergency CABG population.
authors.affiliation: Department of Cardiothoracic Surgery, Aarhus University Hospital, Skejby, Aarhus, Denmark. pwi@sks.aaa.dk
authors.forename: Per
authors.initials: P
authors.lastname: Wierup
authors.forename: Sten Lyager
authors.initials: SL
authors.lastname: Nielsen
authors.forename: Henrik
authors.initials: H
authors.lastname: Egeblad
authors.forename: Henrik
authors.initials: H
authors.lastname: Scherstén
authors.forename: Per-Ola
authors.initials: PO
authors.lastname: Kimblad
authors.forename: Odd
authors.initials: O
authors.lastname: Bech-Hansen
authors.forename: Anders
authors.initials: A
authors.lastname: Roijer
authors.forename: Folke
authors.initials: F
authors.lastname: Nilsson
authors.forename: Per Hostrup
authors.initials: PH
authors.lastname: Nielsen
authors.forename: Steen Hvitfeldt
authors.initials: SH
authors.lastname: Poulsen
authors.forename: Henning
authors.initials: H
authors.lastname: Mølgaard
mesh_terms: D001026:Coronary Artery Bypass; D003324:Coronary Artery Disease / Q000150:complications / Q000453:epidemiology / Q000601:surgery*; D003718:Denmark / Q000453:epidemiology; D006801:Humans; D008944:Mitral Valve Insufficiency / Q000000981:diagnostic imaging / Q000453:epidemiology / Q000209:etiology* / Q000601:surgery; D017202:Myocardial Ischemia / Q000453:epidemiology / Q000209:etiology* / Q000601:surgery; D015995:Prevalence; D012720:Severity of Illness Index; D013548:Sweden / Q000453:epidemiology; D014463:Ultrasonography